archiecorry

I have 2011 Serrano motorhome. There are two switches at door entry and two switches in hall, these control two lines of 3 lights. If both switches at door are on all lights come on and you can shut off from hall switches or vise a versa. If I just turn one switch of all lights go out except for two and the come on very dim. Any ideas what might be the problem. Thanks, AC